The DC-1450-xxx from RF & Noise Components is a RF & Microwave Circulator with Frequency 1.3 to 1.6 GHz, Average Power Forward 250 W, Insertion Loss 0.3 to 0.5 dB, Isolation 21 to 24 dB, Return Loss 21 to 24 dB. Tags: Drop-in Circulator. More details for DC-1450-xxx can be seen below.